IP addresses are uisually written an displayed in human-readable notations, sic as 172.16.254.1 in IPv4, an 2001:db8:0:1234:0:567:8:1 in IPv6. The size o the routin prefix o the address is designatit in CIDR notation bi suffixin the address wi the nummer o signeeficant bits, e.g., 192.168.1.15/24, that is equivalent tae the historically uised subnet mask 255.255.255.0.